no matter your tax rate, contributing to a 401(k) can help you save money on taxes and boost your retirement security. your contributions to a traditional plan are not included in your taxable income, and earnings on roth contributions are tax-free. the good news for savers is that in 2013 401(k) limits go up to $17,500, and employees aged 50 or over can contribute an additional $5,500. but, at the end of 2011, the average account balance in 401(k)s nationwide was just under $60,000. if you're not sure you're doing all you can to lower your taxable wages and secure your retirement, finras new 401(k) save the max calculator can help you do the math to find out. i'm gerri walsh. >> tom: join us tomorrow on twitter for a tweet-up, that's when you meet together on twitter. we'll talk about teaching kids about saving money. alisa weinstein, co-founder of helpkidsfly.org and author of "earn my keep" will be our guest. here's what you do: follow us on twitter at bizrpt, and use the tweet-up hashtag "financial education". that's tomorrow, thursday at 3 pm eastern. susie, we're really looking forward